CN217844966U - A detection pin mechanism - Google Patents

Abstract

The utility model discloses a detection pin mechanism, which comprises a base, a detection pin, a detection block and a cylindrical handle, wherein the base is provided with a D-shaped guide hole, the detection block is provided with a first center hole, and the cylindrical handle is provided with a second center hole; the detection pin is divided into three sections: d shape guide segment, cylinder canned paragraph, detection axle, the first centre bore of detecting the piece is passed to the D shape guide segment of detecting the round pin, until first centre bore and cylinder canned paragraph interference fit, it just fixes on detecting the round pin just to detect the piece like this, D shape guiding hole on the base is continued to be passed to the D shape guide segment that will detect the round pin, D shape guide segment and D shape guiding hole clearance fit, realize detecting the removal of round pin along D shape guiding hole axis direction, then the second centre bore interference fit of D shape guide segment and cylinder handle, cylinder handle just fixes on detecting the round pin this moment the utility model discloses simple structure, convenient operation, design benefit detects effectively, not only can detect the hole site degree, can also detect a profile degree.

Description

A detection pin mechanism

Technical field:

The utility model relates to the technical field of auto parts detection, in particular to a detection pin mechanism.

Background technique:

When detecting the hole position of auto parts, the detection pin is generally used for detection. According to the design method of the conventional detection pin: the detection shaft diameter d of the detection pin is equal to the maximum physical aperture size Dmin of the hole to be detected minus the position degree T of the hole, that is: d=Dmin-T. But sometimes the difference between the position degree T of the hole and the diameter of the hole is very small, and even the degree of position is greater than the diameter of the hole. At this time, according to the conventional design method of the detection pin, the detection shaft diameter d (d=Dmin-T) of the detection pin is very small, even a negative value. This brings the following problem: when the detection shaft diameter d of the detection pin is very small, it is easy to be broken during detection. The detection shaft diameter d of the detection pin is a negative value, which is impossible in reality and cannot be designed.

Utility model content:

The technical problem to be solved by the utility model is that when the hole position detection of existing auto parts, when the detection shaft diameter d of the detection pin is very small, it is easy to be broken during detection. The detection shaft diameter d of the detection pin is a negative value, which is impossible in reality and cannot be designed. A detection pin mechanism is provided, which has the advantages of simple structure, convenient operation, ingenious design, and effective detection.

In order to achieve the above object, the utility model provides a detection pin mechanism, which includes a base, a detection pin, a detection block, and a cylinder handle. The base is provided with a D-shaped guide hole, and the detection block is provided with a first central hole. The cylindrical handle is provided with a second central hole; the detection pin passes through the first central hole of the detection block and the D-shaped guide hole of the base in sequence, and then is interference-fitted with the second central hole of the round handle.

Preferably, the detection pin is divided into three sections: a D-shaped guide section, a cylindrical fixed section, and a detection shaft. The D-shaped guide section of the detection pin passes through the first central hole of the detection block until the first central hole and the cylindrical The fixed section is interference fit, so that the detection block is fixed on the detection pin, and the D-shaped guide section of the detection pin continues to pass through the D-shaped guide hole on the base, and the D-shaped guide section and the D-shaped guide hole are clearance matched to realize detection The pin moves along the axial direction of the D-shaped guide hole, and then the D-shaped guide segment is interference-fitted with the second center hole of the cylindrical handle, and the cylindrical handle is fixed on the detection pin at this time.

Further, the diameter d of the detection shaft 23 is equal to the sum of the minimum physical size Dmax of the hole to be detected and the position T of the hole to be detected, ie: d=Dmax+T.

Further, the detection block is made of transparent material, so that it is convenient to see through the detection block whether the end of the detection shaft 23 can completely cover the hole to be detected.

After adopting the above structure, compared with the prior art, the utility model has the following advantages: the utility model has the advantages of simple structure, convenient operation, ingenious design and effective detection. It solves the disadvantages caused by the conventional design method of detecting pins, and not only can detect the hole position, but also can detect the surface profile.

Description of drawings:

The following is a brief description of the contents expressed in the drawings of this specification and the marks in the drawings

Figure 1. Schematic diagram of the detection pin mechanism;

Figure 2. Exploded view of the detection pin mechanism;

Figure 3. Schematic diagram of the detection pin;

Figure 4. Schematic diagram of the detection pin mechanism when detecting parts.

As shown in the figure: 1. Base, 2. Detection pin, 3. Detection block, 4. Round handle, 11. D-shaped guide hole, 21. D-shaped guide section, 22. Cylindrical fixed section, 23. Detection shaft, 31, the first central hole, 41, the second central hole.

Detailed ways:

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated:

As shown in Figures 1-3, a detection pin mechanism of the present invention includes a base 1, a detection pin 2, a detection block 3, and a cylindrical handle 4. The base 1 is provided with a D-shaped guide hole 11, and the detection block 3 is provided with a first center hole 31, and the cylindrical handle 4 is provided with a second center hole 41;

The coordination relationship of the detection pin mechanism is as follows:

As shown in Figure 2, the D-shaped guide section 21 of the detection pin 2 passes through the first central hole 31 of the detection block 3 until the first central hole 31 is interference fit with the cylindrical fixing section 22, so that the detection block 3 is fixed on the detection on the pin 2; then the D-shaped guide section 21 of the detection pin 2 continues to pass through the D-shaped guide hole 11 on the base 1, and the D-shaped guide section 21 is in clearance fit with the D-shaped guide hole 11 to realize the detection pin 2 along the axis of the guide hole 11 direction; finally, the D-shaped guide section 21 is interference-fitted with the second center hole 41 of the cylinder handle 4, so that the cylinder handle 4 is fixed on the detection pin 2. Through the above assembly operations, the assembly state shown in FIG. 1 is formed.

Among them, the detection design key points of the detection pin mechanism: according to the rules of geometric dimensions and tolerances, the diameter d of the detection shaft 23 is equal to the sum of the minimum physical size Dmax of the hole to be detected and the position degree T of the hole to be detected, namely: d=Dmax+T. During detection, if the end of the detection shaft 23 can completely cover the hole to be detected, it means that the position offset of the hole to be detected is within the range of position degree T, and the position of the hole is determined to be qualified. Otherwise it is unqualified.

The detection block 3 is made of transparent material, such as transparent plexiglass, so that it is convenient to see through the detection block whether the end of the detection shaft 23 can completely cover the hole to be detected.

When the surface where the hole to be detected needs to be detected, the detection block 3 is used to realize it. At this time, the length of the detection axis 23 is denoted as L. That is, the axial distance between the end of the detection shaft 23 and the detection block 3 is L.

Combining Figures 1 to 4, the detection method of the detection pin mechanism is as follows: Figure 4 has an automobile part (only shows its partial view).

(1) First, position and clamp the part on the inspection tool (not shown in the inspection tool diagram), and the inspection pin mechanism is fixedly set on the corresponding position of the inspection tool.

(2) Detection of the position of the hole to be detected: hold the cylindrical handle 4, push the detection pin 2 to the surface to be detected, visually check that there is no hole to be detected on the surface to be detected, that is, the end of the detection shaft 23 completely covers the hole to be detected, is qualified. Otherwise it is unqualified.

(3) Detection of the surface profile of the surface to be tested (the value of the profile is F): hold the cylindrical handle 4, push the detection pin 2 to the surface to be tested, and measure the surface to be tested and the detection block 3 with a go-no-go gauge or plug ruler gap between. If the gap value is within the range of L-(F/2) to L+(F/2), it is qualified, otherwise it is unqualified.

The above is only a description of the preferred embodiments of the present utility model, but should not be construed as a limitation on the claims. Any equivalent structure or equivalent process transformation made by using the description and drawings of the utility model is included in the patent protection scope of the utility model.

Claims (4)

1. a detection pin mechanism, is characterized in that, comprises base (1), detection pin (2), detection block (3), cylinder handle (4), and described base (1) is provided with D-shaped guide hole ( 11), the detection block (3) is provided with a first central hole (31), and the cylindrical handle (4) is provided with a second central hole (41); the detection pins (2) pass through in sequence The first center hole (31) of the detection block (3) and the D-shaped guide hole (11) of the base (1) are then interference fit with the second center hole (41) of the cylinder handle (4). 2. A detection pin mechanism according to claim 1, characterized in that the detection pin (2) is divided into three sections: a D-shaped guide section (21), a cylindrical fixed section (22), a detection shaft (23 ), the D-shaped guide section (21) of the detection pin (2) passes through the first central hole (31) of the detection block (3), until the first central hole (31) interferes with the cylindrical fixed section (22) Cooperate so that the detection block (3) is fixed on the detection pin (2), and the D-shaped guide section (21) of the detection pin (2) continues to pass through the D-shaped guide hole (11) on the base (1), The D-shaped guide section (21) is clearance-fitted with the D-shaped guide hole (11) to realize the movement of the detection pin (2) along the axis of the D-shaped guide hole (11), and then the D-shaped guide section (21) and the cylindrical handle (4 ) of the second center hole (41) interference fit, and now the cylinder handle (4) is fixed on the detection pin (2). 3. A detection pin mechanism according to claim 2, characterized in that the diameter d of the detection shaft (23) is equal to the sum of the minimum physical size Dmax of the hole to be detected and the position T of the hole to be detected, that is: d=Dmax+T. 4. A detection pin mechanism according to claim 1, characterized in that the detection block is made of a transparent material, which is convenient to see through the detection block whether the end of the detection shaft (23) can completely cover the hole to be detected.

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